Which one of the following experiments by Griffith with Streptococcus pneumoniae , resulted in the death of mice due to pneumonia?

Step-by-step solution

Frederick Griffith conducted a series of experiments with Streptococcus pneumoniae to demonstrate bacterial transformation. When mice were injected with the live S strain (virulent), they died from pneumonia. When injected with the live R strain (non-virulent), they survived. When injected with the heat-killed S strain, they survived. When injected with a mixture of live R strain and heat-killed S strain, the mice died. This occurred because some transforming principle from the heat-killed S strain enabled the live